Wing Commander CIC

Ok, after *triple-checking* all my settings against my dosbox's conf file (using version 0.74 in Linux), I *still* can't get any speech (not sound), so here's the conf file's contents:

[sdl]
fullscreen=false
fulldouble=false
fullresolution=1024x768
windowresolution=original
output=surface
autolock=true
sensitivity=100
waitonerror=true
priority=higher,normal
mapperfile=mapper-0.74.map
usescancodes=true

[dosbox]
language=
machine=vga
captures=capture
memsize=64

[render]
frameskip=0
aspect=false
scaler=normal2x

[cpu]
core=normal
cputype=auto
cycles=6500
cycleup=500
cycledown=500

[mixer]
nosound=false
rate=22050
blocksize=2048
prebuffer=10

[midi]
mpu401=intelligent
mididevice=default
midiconfig=

[sblaster]
sbtype=sb16
sbbase=220
irq=7
dma=1
hdma=5
sbmixer=true
oplmode=auto
oplemu=default
oplrate=44100

[gus]
gus=false
gusrate=22050
gusbase=240
gusirq=5
gusdma=3
ultradir=C:\ULTRASND

[speaker]
pcspeaker=true
pcrate=22050
tandy=auto
tandyrate=22050
disney=true

[joystick]
joysticktype=auto
timed=true
autofire=false
swap34=false
buttonwrap=false

[serial]
serial1=disabled
serial2=disabled
serial3=disabled
serial4=disabled

[dos]
xms=true
ems=true
umb=false
keyboardlayout=auto

[ipx]
ipx=false

[autoexec]
loadfix
mount c ~/dospath/WC2/
c:
wc2.exe
exit

Anyone know what might be wrong?